Accessory device for typewriters



Jan, 8, l1946. J. G. BANISTER ACCESSORY DEVICE FOR TYPEWRITERS FiledOct. 7, 1944 2 Sheets-Sheet 'l JAMES 6.5AN/57Ef? Jan. 8, 1946. v .J..:..l BANISTER I 2,392,517

ACCESSORY DEVICE FOR TYPEWRITERS Filed oct. 7, 1944 2 sheets-sheet 2Patented Jan. 8, 1946 UNITED STATES 'PATENT' OFFICE Y A 392,517 vACCESSORY DEVICE F R TYPEWRITERS James Banister, Chicago, Ill.Application October 7, 1944, Serial No. 557,653

(ci. 19V-180) 8 Claims.

This' invention relates generally to accessory devices for typewritersand is directedmoreparticularly to a device for facilitating the makingof corrections on a typed page. v

A principal object of the present invention is to provide a device whichmay be ymounted upon a typewriter as an accessory, bymeans o f which themaking 'of corrections cna' typedpage may be easily and quicklyaccomplished without the usual operation of erasing and retyping theincorrectly typed letter.

a device of the vcharacter stated, carrying a rollv of paper ribbonhaving an adhesive upon one surface thereof, together with means formoistening and cutting off a section of such paper ribbon and applyingthe cut-od piece to the typed sheet over the incorrectly typed letter.

The invention will be best understood from a consideration of thefollowing detailed description taken in connection with the accompanyingdrawings forming a. part of the present invention, it being understood,however,l thatthe invention is notconned to a strict conformity with theshowing of the drawings but may be changed or modified so long as such.changes or modifications mark no material departure from the salientfeatures of the invention as expressed in the appended claims.

In the drawings:

Figure 1 is a view in side elevation of a device constructed inaccordance with the present invention showing the relation of the partswhen the device is idle.

Figure 2 is a view corresponding to Figure 1 but showing the relation toparts when the device ings the device of the present inventionisillustrated as mounted upon the front of a typewriter, not shown, bymeans of a bracket I0, se4 l it will be readily apparent that it may'beusefl` by being held in the hand, in which case the mounting orsupportingbracket might be lappropriately formed for graspingv bythehand.

The mounting bracket III issecured to the front part of the typewritermachine so that the guide I3 which is carried upon the topofthe`bracket, will be directed toward the platenroll II at the left hand sideof the point vk(inthe platen roll which is struck by a type key. Thereason for this mounting `will become readily apparent as thedescription of the invention proceeds- Extending through and slidablysupportedfin:v

the guidev I6 is a reciprocable presser bar I4,;the forward endefa'ce.yof which is slightly curved to substantiallyy conform 4to, the curvatureof the platen roll, as indicatedat I5. Upon the outer endofthis bar I4,or that end remote from the platen roll II, is the upstanding guide I6which terminates in a forwardly inclined finger portion I'I and thisupstanding portion I6 of the presserv bar is formed to provide avertical guide or slot I8 through which slidably extends the papervribbon shifter or plunger I9.

At its outer end this plunger I9 carries.v the head or button 2Uwhilenat its inner end it carries a'friction finger 2| which may be inthe form y of a rubber tip.

is advanced for the application of a portion of n Adjacent the forwardend of thev plunger I9,

the plunger has formed therethrough'` theLlongitudinally extending slot22 through each end'of which is extendeda stop pin or screw 23 Awhich isadjustable as to` its positionin the slot so that the space between thetwo stop pins may be increased or decreased inlength' within certainlimits. Y v

AheadV ofthe guide I3, the presser barcarries the `plunger supportinglpost 24 andat the upper end of this post there is mountedthetransversely extending pin 25 which passes through the slot 22 of theplunger as illustrated. Thispin 25 is suitably supported so thattheforward end of the plunger may be oscillated ,or vrocked vthereon toraise and lower the friction tip,2| "andthe plunger is'also designed tolmove forwardly and Behind`A the rearwardly upon the pin 25 as will bereadily ythere'is'mountedt apaper ribbon guide support` ing bracket 25;the forward movement of which upon the presser bar is limited by the setscrew 21 which is carried by the presser bar.

The bracket 25 supports the paperribbon guide Y 2B which has asubstantiallyv horizontal portion 29 which merges at its forward endinl-the downdirectly. Also, it will be seen that this will bring thegummed surface in a proper position to be fpressed against themoistening wick 40 when the extended portion of the ribbon is pressedtoward the platen roll and the paper lying thereover, by the plungerbar.

Secured tothe rmouth 39 of thev water recept'acle upon the side of thewick 4I) remote from the presser bar, is an upstanding Spring tongue 4I;'which normally holds the wick'in the proper position to have theextended end portion of the paper ribbon pressed thereagainst, but whichis su-iiiciently light in weight to be readily bent or `flexed overwhenithe plunger bar is pushed turned portion 30, the outletiormouthofwhichv 'I'h'eferear Vpart of the portion A29- o' the paper ribbonguidelcarries a"paper`ribbon roll yholder f 32 Yupon;Y which the`riltfbonroll;`r designated 33j,` is Y imbuntedr'k 'Ihe endofjtheribbon' is ,then threaded forwardly Athrougrlf'r'the guicleefl'`sosthatV when an" advance movementis imparted' to the end of theribborr` allportion thereofl will be extended down wardly froml theoutlet of Vthe guide to. position before-the forwardlendoftheloar:

The desiredforward movement' is imparted-to the'j papenribbomby means ofthe frictionv tip '2I ofi the plunger barV I9 which isjadapted toybebrought Vifntolcontact with the-ribbon through the slot 34 formed'longitudinally' in jtheun'der part offtheg'u'ideLZ:V Y y Y e j Tlie'-Aaction afl-shifting the ribbonv forwardly toV the desired extentisproducedby oscillatingthev wardi'ry; Tnea-aiount-pfitne Vribbon whichwi11- bagprojectedffrom;the Ioutlet-end of the' guide" will? bedetermined ongud -bracket 26, -wh'ichdsmovable on'- the presserfbar I4,there' is mounted on. the pressenbar,` a vhanger bracket! 35 which` Y is-adaptedltoliavef movement' on the: presse'rf bar and which is disposedbetweenthe-'braclrlet 25 and4 the. plunger supporting post 24. Betweenthis bracket 35land1th'e posti2'4 is'acompression spring `36l whichlnormally urges-fthebraclets y and 35 away from the post 24. AYUponsthepresser bar- Mi between the 4presser bar-. t'guideI3,.vanditherupstanding outer end por-V tion (I6, isa compressionspringv3-'Ivv-hich, bear-L 1 ingJat*l one end against. the xed' guideI3; constantly: purge's ,movement of '.the 'presser'k bar I4 back orvaway from --theplaten-roll; Y 'Y TheY hanging vbra'cllzet 5 .is`connected with'A and supports a water receptacle 38 which has the-topfoutletx39 from'. which extendsf upwardly thetape moistener; wick? y40which i's positioned with re-V spectpitozthe. forwardA endl of thepresser -bar so that; the; extended lportionf of thepaper ribbonwil1beVintroducedbetweenLthe wick 4D and the end face IS'oLthepuSherbar:f

One; side?surfacezoiY the ribbon is 'provided-'with' anradhesive andthis/surface is-avvayfrornqthev `friction itip:2j..sothatlthela'tt'erengages` the paper forwardly.

The forward side of the water receptacle 38 carries the stop-finger42dwhich engages the surface ofthe paper I2 on the platen roll in theoperation rof the device as hereinafter described.

The operation of the present device is as -followsz" ,c V; j "VQ l Whenvan errori'is i made'upon. the ipapersl-et I2;v `the printed letter willvadvance yone step Ibeyond the type strikin'glpositionjas'gsoon Vasl theY key'is'released. VThepresent 'device i's'so mounted- Oni `the' machinethat 'the presser barV will then. be in line with theincorrectlyprintedmftterjaftef thisadvance s tepis madegj i V 2 lIfhe user "ofV thedevice'then oscillatesthej outer end ofthe' plungeriIS d'ovv'nvvardly`to bringfhe tip 2| into engagement withthe paperribbonand then pushesthe'plung'er 'inwai'dlyslifji the ribbon to the proper extent'to" mdve'aportion thereof out of Vthefguide and into; position in :fijont ofthe-curved face vI5of"v thepresserbar I'41jf'ITie' plunger t9' isthenperrnitted tooscillate back' to its horizontall position whereupon4forward' pressure is appliedY tothe"'buttonjiwhichwill effecty theadvance'Y movement. of' the presser" bar I4. WhenA the; presser lbar'Visgshifted;l forwardly,` the rpaper ribboncarrier and :the water'rrecep-V tacle willalsomcveforwardly'untillthe stop finger 412 engagesthepapercri` the, platen roll'. L Y 'Ijhijs will'j stop the advancemovernentolV the `waterijelceptalcle-and wincaus-the;-misteningjwicktocome into lcontact'with the" gummedls'urface"tended:portiono'l Vh fpaper ribbon'.

printgb'y the face F55 off theL presser ba 1.332? lemary i After theapplication of the coverg a typewriter platen roll, oomprisingmansjffosup? of a typewriter'platen rollt mearsfrsmeasuring 01T prescribedlengthof said ribbon -andp'o'sig vtioriing the same in front of suchroll,-andme"ans`- ribbon lhaving lone surface gummed,- means' for'moving a portionof'the' endof the ribbon into aprescribed position withrespect to the platen :roll of the typewriter, a yieldable means formoistening the gummed surface of the said portion of the ribbon,and`means for pressing said ribbon portion across said moistening means andcutting off the moistened portion and carrying the same toward theplaten lroll von .and over said yieldable means for application to atyped sheet lying against the platen roll. i '.3. A misprint correctingdevice for a typewriter, comprising a means for supportingn in front ofa typewriter `platen roll a paper ribbon roll having one gummed surface,a guide through which the end of the roll may be extended, the guidehaving an outlet from which a pbrtion of the ribbon end is projected,said outlet being positioned with respect to the typewriter platen rollwhereby the projected portion of the ribbon will have its gummed surfacein opposed relation with the platen roll, means for shifting the ribbonto project a portion of the end from the guide outlet, a moisteningelement shiftably supported between the platen roll and the projectingportion of the ribbon, a combined shearing and pressing meansconstructed and arranged to move against the gum free side of theprojecting portion of the ribbon and shear' oif and press the gummedface of such portion against said moistening element and to press themoistened portion against a paper sheet overlying the platen roll, andmeans for effecting the shifting of the moistening element out of thepath of movement of the sheared off moistened portion.

4. An attachment for a typewriter, comprising a guide adapted to besecured to the typewriter in front of the typewriter platen roll, apresser bar carried by the guide to align with the typewriter platenroll upon the side of the point struck by a type element to which thetyped character moves automatically after the making of the typedimpression on a paper sheet, a supporting means for a paper ribbon rollhaving one side face gummed, means for shifting the ribbon to positionla portion thereof between an end of the presser bar and the platenroll, a moistening element shiftably supported between the platen rolland the projecting portion of the ribbon, cooperating means between thepresser bar and an e'dge of the guide for shearing off the said portionof the ribbon upon movement of the presser bar toward the platen roll,means for effecting the shifting of the moistening element out of thepath of movement of the sheared off moistened portion and said presserbar pressing the said portion of the ribbon against a paper sheet on theplaten roll by the said forward movement.

5. A device of the character stated, for application to a typewriter,comprising a supporting guide, a presser bar mounted in said .guide formovement toward and away from the typewriter platen roll, the forwardend of the presser bar -being designed to substantially conform to theplaten roll, a reciprocable finger designed for connection with theribbon to effect the advancement of the latter through the guide for theprojection of a portion of the ribbon into position in front of theforward end of the presser bar, a

moistening wick,` a water 1 receptacle v'con'r'i'e'eted with the presserbarto move therewith but'hav'- ing movement relative to lthe presserbar, said fwickbeing supported upon the side of the extended portion ofthe ribbon opposite from the -forward vend of the Vpresser bar, theribbon guide and holder and the water receptacle vbeing movable with thepresser bar toward the platen roll, the ribbon guide havinglimitedmovement relative to the presser bar, means for checking the advancemovement of the water receptacle ahead of the presserbar movementwhereby to bring the said portion of the ribbon in contact with saidmoistening wick, means for checking the forward movement of the ribbonguide after Ythe checking of movement of the water receptacle and beforethe presser |bar reaches the limit of its movement, and means operated-by the presser bar subsequent to the checking of the movement of theribbon guide to cut-off the said portion of the ribbon and advance thesame into contact with a paper sheet on the platen roll.

6. An attachment for a typewriter, comprising a guide adapted to besupported on a typewriter in front of the platen roll, a memberreciprocably supported by the guide for movement toward and awayfrom-the platen roll, a means for supporting a roll of gummed paperadjacent to said member, means movable independently of the member forfeeding a portion of the paper into position between the member and theplaten roll with the gummed side of the paper toward the platen roll, amoistening element shiftably supported between the member and the platenroll and between the platen roll and the shifted portion of the paper,and means for effecting relative movement between the shiftablemoistening element, the projected portion of the paper and said memberupon movement of the member toward the platen roll whereby to wipe thegummed surface of the said portion of the paper across the moisteningelement immediately preceding the application of the moistened paperportion to the surface to which it is to .be applied.

7. An attachment for a typewriter, comprising a guide designed to besecured to a typewriter in front of the platen roll thereof, a presserbar reciprocably supported by the guide, the presser bar having aforward end designed to press a moistened portion of a gummed paperribbon against a sheet on the typewriter platen roll, a moistening unitcomprising a receptacle, a moistening pad extending upwardly from thereceptacle and adapted to be shifted to a lowered position, a guidecarried lby the receptacle, said guide having the bar member slidablyextended therethrough, spring means interposed between said guides tonormally yieldably hold the moistening unit in an advance position withrespect to the forward end of the bar member, spring means connectedbetween the rst guide and the bar member and normally acting toyieldably hold the bar member in retracted position with respect to theplaten roll, means for supporting a gummed paper roll upon the barmember and for guiding a portion of such a roll into position betweenthe moistening pad and the forward end of the bar member, means carriedby the bar member for advancing a portion of the paper into the statedposition, and means for shearing off the advanced portion of the gummedpaper from the roll for the movement of such sheared off portion by thebar member across the moistening pad toward the adjacent platen roll.

8. An attachment for a typewriter, comprising front of a platen rolLa.presser bancarried/:by the guide to align` an end With the vtypewriterplaten ro11 vand for movement ytoward 'a 'paper sheet thereon, a,supportslidably mounted. on said bar to Ycarry a gummed paper strip,`means for guiding an end of such stripv from the support across thesaid end of the bar, the said'end of the Vloar and the guiding meansbeing formed to 'provide cooperating shearing means to -cut l01T a.portion of the paper strip-upon relativermov'ei ment of the barand'paper strip support, means carried by the bar for movement relativethereto y position across the 'said end of the bar, asmos-a tem'ng unitsupported by and adapted to move .relative to the bar and yincluding ashiftablepad spaced from thesa'id vvend. of the bar and between Winch:and the end of the bar the saidA end Vportion of Vthe strip ispositioned, and said moistening vunitbeing constructed and arrangedvrelative to the bar -to engage and be stopped by the platen Lroll inadvance of the lbar whereby the said portion of the paper strip will besheared off and wiped across the pad and then pressed bythe said kend ofthe bar against a sheet on the platen roll.

JAMES G. BANISTER.

